Step stool



FIG. 1 is a rear perspective view of the design of the presentinvention.

FIG. 2 is a rear view of the design shown in FIG. 1.

FIG. 3 is a right side view of the design shown in FIG. 1.

FIG. 4 is a front view of the design shown in FIG. 1

FIG. 5 is a top view of the design shown in FIG. 1; and,

FIG. 6 is a bottom view of the design shown in FIG. 1.

The broken lines are for illustrative purposes only and form no part ofthe claimed design.

The ornamental design for the step stool, as shown and described.